7.3L V8 DIR vs. 7.3L V8 FI whats the difference? What does DIR and FI mean? are both powerstroke?

 

Are confused with termininology? International made two 7.3 motors...the 7.3 IDI (indirect injected) which is found in the older diesels and the 7.3 DI or direct injected which essentially is the powerstroke motor. Easiest way to tell is by how much noise the actual motor makes (not the exhaust). DI motors make a HELL of a racket in comparison to an IDI due to the physics of the motor.

hope this helps!

 

Any difference in performance? quality? between the two?

 

the DIT is the better of the two otherwise known as the POWERSTROKE. all 94.5-97 obs diesels are POWERSTROKES.

 

The Powerstroke is an all electronically controlled engine...electro-hydraulically fired injectors, Turbocharged, Direct injection, no throttle cable all electronic, and alot more power and torque. The IDI is all mechanical, uses a rotary injection pump with mechanical injectors, has cable throttle pedal, automatic but mechanical high idle and timing advance, only computer would be for the E4OD auto transmission, much less power. All non-turbo until 1993.5 then a turbo model was available with 4 more horses.

Powerstroke: Direct Injection- Injects the fuel directly into the top of the cylinder.
Stock HP/TQ: 215-225HP/ 410-480ft-lbs

Ford IDI Diesel: Indirect Injection- Injects the fuel into a pre-combustion chamber(pre-cup), that is where the fuel is ignited. It doesnt ignite directly on top of the piston like a powersroke.
Stock HP/TQ: 186-190HP/ 333-350ft-lbs

-----------------Jeremy

 

Thank you so much.

 

No problem...anytime
------------Jeremy

 

somebody read the new diesel power... lol

 

That reminds me I need to go buy it...lol... No actually I had a IDI before the Stroker and all of that was completely from memory I actually suprised myself on that post...lol
---------Jeremy

 

is it out already? crap i was just at the store

 

yepp its out I just went and bought it
------------Jeremy

 

i get it in the mail haha

 

Hey Jeremy , do ya sometimes miss your old IDI? I had an 87 with the 6.9 and I do miss the simplicity of the IDI as opposed to the PSD....... The 6.9 needed a turbo in a bad way but still it was way more capable than the gas engines, it was a true work horse of an engine... I never needed a code reader or scan tools the 6.9 was indeed made for the shadetree mechanic................

 

That's a pict of my old IDI truck in my signature. I loved that old girl. Worked hard, didn't complain...much. Lasted about ~380K before the body started to rust off the frame. Sold it to a neighbor....he's still driving it with almost 500K on the odometer. It was totally gutless compared to the PSD's. Getting on the e-way with the boat in tow was always exciting. Another 1-2 miles down the road to get up to 65MPH.

 

Cuda Jim , did ya have an auto trans? Mine was a 4 speed still weak compared to the psd but my bil had a 6.9 with an auto and man that truck was a dog, those idi needed gears to get the most out of the powerband........